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Diffstat (limited to 'node_modules/lodash/indexOf.js')
-rw-r--r-- | node_modules/lodash/indexOf.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/node_modules/lodash/indexOf.js b/node_modules/lodash/indexOf.js new file mode 100644 index 0000000..3c644af --- /dev/null +++ b/node_modules/lodash/indexOf.js @@ -0,0 +1,42 @@ +var baseIndexOf = require('./_baseIndexOf'), + toInteger = require('./toInteger'); + +/* Built-in method references for those with the same name as other `lodash` methods. */ +var nativeMax = Math.max; + +/** + * Gets the index at which the first occurrence of `value` is found in `array` + * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) + * for equality comparisons. If `fromIndex` is negative, it's used as the + * offset from the end of `array`. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Array + * @param {Array} array The array to inspect. + * @param {*} value The value to search for. + * @param {number} [fromIndex=0] The index to search from. + * @returns {number} Returns the index of the matched value, else `-1`. + * @example + * + * _.indexOf([1, 2, 1, 2], 2); + * // => 1 + * + * // Search from the `fromIndex`. + * _.indexOf([1, 2, 1, 2], 2, 2); + * // => 3 + */ +function indexOf(array, value, fromIndex) { + var length = array == null ? 0 : array.length; + if (!length) { + return -1; + } + var index = fromIndex == null ? 0 : toInteger(fromIndex); + if (index < 0) { + index = nativeMax(length + index, 0); + } + return baseIndexOf(array, value, index); +} + +module.exports = indexOf; |